- Any chemotherapy (e.g., hydroxyurea), immunomodulatory drug therapy (e.g., thalidomide, interferon-alpha), immunosuppressive therapy, corticosteroids > 10 mg/day prednisone or equivalent, or growth factor treatment (e.g., erythropoietin), hormones (e.g., androgens, danazol) =< 14 days prior to registration; note: patients who are on ruxolitinib may continue on without a 14 day wash out at the treating physician's discretion